代码路径：
frameworks/base/core/res/res/values-zh-rCN/strings.xml
frameworks/base/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java
在strings.xml文件中有该字段android_checking_file_system_title 

<string name="android_checking_file_system_title">"Android 正在检查文件系统..."</string>

在PhoneWindowManager.java文件中showBootMessage()方法中isNormal字段表示是否是正常开机启动，如果是异常开机启动就会弹出该对话框 " Android 正在检查文件系统…" 

publicvoidshowBootMessage(final CharSequence msg, final boolean always){if(mHeadless)return;
        mHandler.post(newRunnable(){
            @Override publicvoidrun(){if(mBootMsgDialog ==null){
                    mBootMsgDialog =newProgressDialog(mContext){// This dialog will consume all events coming in to// it, to avoid it trying to do things too early in boot.
                        @Override publicbooleandispatchKeyEvent(KeyEvent event){returntrue;}
                        @Override publicbooleandispatchKeyShortcutEvent(KeyEvent event){returntrue;}
                        @Override publicbooleandispatchTouchEvent(MotionEvent ev){returntrue;}
                        @Override publicbooleandispatchTrackballEvent(MotionEvent ev){returntrue;}
                        @Override publicbooleandispatchGenericMotionEvent(MotionEvent ev){returntrue;}
                        @Override publicbooleandispatchPopulateAccessibilityEvent(
                                AccessibilityEvent event){returntrue;}};/** SPRD: clear dalvik cache when last shutdown abnormal @{ *///mBootMsgDialog.setTitle(R.string.android_upgrading_title);boolean isNormal = SystemProperties.get("persist.sys.lastbootflagbak","unnormal").equals("normal");
                    mBootMsgDialog.setTitle(isNormal?R.string.android_upgrading_title:
                                           R.string.android_checking_file_system_title);/** @} */
                    mBootMsgDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
                    mBootMsgDialog.setIndeterminate(true);
                    mBootMsgDialog.getWindow().setType(
                            WindowManager.LayoutParams.TYPE_BOOT_PROGRESS);
                    mBootMsgDialog.getWindow().addFlags(
                            WindowManager.LayoutParams.FLAG_DIM_BEHIND
                            | WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN);
                    mBootMsgDialog.getWindow().setDimAmount(1);WindowManager.LayoutParams lp = mBootMsgDialog.getWindow().getAttributes();
                    lp.screenOrientation = ActivityInfo.SCREEN_ORIENTATION_NOSENSOR;
                    mBootMsgDialog.getWindow().setAttributes(lp);
                    mBootMsgDialog.setCancelable(false);
                    mBootMsgDialog.show();}
                mBootMsgDialog.setMessage(msg);}});}